2021 Hyundai Tucson: Electrical System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 12 owner complaints for the 2021 Hyundai Tucson that list the electrical system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11770328 (filed 10/10/2026): “Loss of info system loss of all dash lights when i turn the engine off most of the time i loose all electrical systems (will not start for at least 15 minutes) if doors lock i can only unlock the drivers door with the auxiliary key. has tried to shift in to park while driving (one time) lost all p…”
- NHTSA complaint ODI #11737345 (filed 05/12/2026): “Vehicle stalled approximately 15 times between april 17 and may 4, 2026, including once on interstate xxx at approximately 50mph with minor children ages [xxx] and [xxx] in the vehicle. the oil and battery lights illuminated simultaneously at each stall. diagnosed as abs module failure first, then…”
- NHTSA complaint ODI #11734552 (filed 04/29/2026): “In october 2025, while the vehicle was still under hyundai’s 5-year warranty, an authorized hyundai dealership diagnosed a significant electrical failure affecting the abs/esc system on my 2021 hyundai tucson. the vehicle was experiencing multiple dashboard warning lights, intermittent key fob malfu…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Moderate
Finding and splicing chewed wiring is doable with a multimeter and patience but can be time-consuming; harness replacement is pro work. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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Sources
Page last updated .